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    copied!<p>I am not sure exactly what you are looking for. I assume resultsTreeView is a TreeViewItem. and I also assume that you are working in wpf. You can do the following through wpf.</p> <pre><code>for (int i = 0; i &lt; lines.Count(); i++) { resultsTreeView.Items.Add(lines[i].ToString().Substring(67,17)); } &lt;TreeView x:Name="resultsTreeView" HorizontalAlignment="Left" Height="100" Margin="37,344,0,0" VerticalAlignment="Top" Width="257" &gt; &lt;TreeView.ItemTemplate&gt; &lt;DataTemplate&gt; &lt;StackPanel Orientation="Horizontal"&gt; &lt;TextBlock Text="{Binding}"/&gt; &lt;CheckBox/&gt; &lt;/StackPanel&gt; &lt;/DataTemplate&gt; &lt;/TreeView.ItemTemplate&gt; &lt;/TreeView&gt; </code></pre> <p>Something similar could be done through code behind</p> <pre><code>for (int i = 0; i &lt; mylist.Count(); i++) { resultsTreeView.Items.Add(mylist[i]); } resultsTreeView.ItemTemplate = TreeViewDataTemp; </code></pre> <p>And then create TreeViewDataTemp the following way</p> <pre><code>private static DataTemplate TreeViewDataTemp { get { DataTemplate TVDT = new DataTemplate(); FrameworkElementFactory Stack = new FrameworkElementFactory(typeof(StackPanel)); Stack.SetValue(StackPanel.OrientationProperty, Orientation.Horizontal); FrameworkElementFactory TextB = new FrameworkElementFactory(typeof(TextBlock)); TextB.SetValue(TextBlock.TextProperty, new Binding()); FrameworkElementFactory ChkBox = new FrameworkElementFactory(typeof(CheckBox)); Stack.AppendChild(TextB); Stack.AppendChild(ChkBox); TVDT.VisualTree = Stack; return TVDT; } } </code></pre> <p>The above gives you 1 item which is text together with a checkbox. Alternatively your method will add a checkbox as a new item after every string item that you add.. which is</p> <pre><code>for (int I=0; I&lt;lines.Count(); I++) { resultsTreeView.Items.Add(mylist[i]); resultsTreeView.Items.Add(new CheckBox()); } </code></pre>
 

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